code: def setUp(self):
      self.sequential_data = Reader().read(
          "./tests/sequence.txt", fmt="USIT", sep=" "
      )
  
imports: import unittest
  import numpy
  import numpy.testing
  from cornac.data import BasketDataset, Dataset, SequentialDataset, Reader
label_desc: Use image node_id 1 for calling the TestSequentialDataset obj's underlying member method code with example usage: obj.setUp() without return types